Ma Yiqiu, Danilishin Shtefan L, Zhao Chunnong, Miao Haixing, Korth W Zach, Chen Yanbei, Ward Robert L, Blair D G
School of Physics, University of Western Australia, Western Australia 6009, Australia.
Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125, USA.
Phys Rev Lett. 2014 Oct 10;113(15):151102. doi: 10.1103/PhysRevLett.113.151102.
We propose using optomechanical interaction to narrow the bandwidth of filter cavities for achieving frequency-dependent squeezing in advanced gravitational-wave detectors, inspired by the idea of optomechanically induced transparency. This can allow us to achieve a cavity bandwidth on the order of 100 Hz using small-scale cavities. Additionally, in contrast to a passive Fabry-Pérot cavity, the resulting cavity bandwidth can be dynamically tuned, which is useful for adaptively optimizing the detector sensitivity when switching amongst different operational modes. The experimental challenge for its implementation is a stringent requirement for very low thermal noise of the mechanical oscillator, which would need a superb mechanical quality factor and a very low temperature. We consider one possible setup to relieve this requirement by using optical dilution to enhance the mechanical quality factor.
受光机械诱导透明概念的启发，我们提议利用光机械相互作用来缩小滤波器腔的带宽，以在先进的引力波探测器中实现频率相关的压缩。这可以使我们使用小规模腔实现约100赫兹量级的腔带宽。此外，与无源法布里 - 珀罗腔不同，所得腔带宽可以动态调谐，这对于在不同运行模式之间切换时自适应优化探测器灵敏度很有用。其实施面临的实验挑战是对机械振荡器的极低热噪声有严格要求，这需要极高的机械品质因数和极低的温度。我们考虑一种可能的设置，通过使用光学稀释来提高机械品质因数，从而缓解这一要求。
